No, you cannot meld with a token that is a copy of a meld component because the token gets exiled in the melding process and would not return to the battlefield
Cards like Ohran Frostfang, Saryth, the Viper's Fang and All-Out Assault dont have deathtouch, but they thrive on giving your creatures deathtouch when you attack
As for the best of the new creatures, O'aka, Traveling Merchant turns your excess counters into carddraw, and Maester Seymour grows creatures of your choice as you grow him
It sure is a busy time in Magic, isnt it gamers
Vivi can only be used be turn and only your turn , so you won't be able to have excess mana to work with on your opponents' turns
In another world, Arthur is number one on this list for being a core piece of that deck - but he just doesn't cut it